@RegDwight: Your profile disclaimer aside, I am not surprised someone with your screen name would have an exhaustive knowledge of Elton John's catalog. :)
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RobustoDec 21 '10 at 13:03

@Robusto: indeed, there have been countless occasions on which I could have quoted Sir Elton, but this is the very first time I have actually done so, and only after previously quoting Zager & Evans, Sting, Simon & Garfunkel, and a children's song. I do try to be diverse.
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RegDwigнt♦Dec 21 '10 at 13:12

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@RegDwight: Zager & Evans, b'god! I didn't expect to hear a reference to that group for another 515 years!
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RobustoDec 21 '10 at 13:17

3 Answers
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I think "Heavy Traffic" is quite commonly used and is totally appropriate

EDIT : On 2nd thoughts, i think they are both inter-changeble but it might depend on the formulation of the sentence - where one might suit better (depending on the overall style) as compared to the other.